Biology

3. the body system that takes in food and breaks it down
6. end sacs in the lungs where oxygen transfers to the circulatory system
7. the chemical reaction between oxygen and glucose that releases energy into cells
8. a group of atoms joined together in a particular way
9. proteins are digested and break down into these smaller molecules
11. a molecule that organisms get from the air and use to release energy
12. large molecules that break down into amino acids
13. the body system that transports molecules to and from all cells of the body
14. takes in oxygen and releases carbon dioxide

1. information about the natural world that is used to support or go against (refute) a claim
2. small projections lining the small intestine where amino acids and glucose can be absorbed into the circulatory system
4. a part of the digestive system
5. a representation that allows us to 'see' an object or system that is too small or too large to be seen with our eyes
7. a process in which atoms rearrange to form new substances
10. a molecule that organisms can use to release energy
15. a part of the digestive system and the respiratory system